#include "mycommon.h"
#include "oled.h"
#include "myi2c.h"
#include "myi2c-dev.h"
#include "oledfont.h"


//OLED的显存
//存放格式如下.
//[0]0 1 2 3 ... 127
//[1]0 1 2 3 ... 127
//[2]0 1 2 3 ... 127
//[3]0 1 2 3 ... 127
//[4]0 1 2 3 ... 127
//[5]0 1 2 3 ... 127
//[6]0 1 2 3 ... 127
//[7]0 1 2 3 ... 127

void send_command(int fd, unsigned char command) {
    unsigned char buf[2];
    buf[0] = 0x00;  // 控制字节，0x00表示接下来的字节是命令
    buf[1] = command;
    write(fd, buf, 2);
}

void send_data(int fd, unsigned char data) {
    unsigned char buf[2];
    buf[0] = 0x40;  // 控制字节，0x40表示接下来的字节是数据
    buf[1] = data;
    write(fd, buf, 2);
}

/**********************************************
// IIC Write Command
**********************************************/
void Write_IIC_Command(uint8_t IIC_Command)
{
	// i2c_smbus_write_byte_data(OLEDfd,OLED_REG_CMD,IIC_Command);
	send_command(OLEDfd,IIC_Command);
	// I2CWriteByteTo(OLEDfd,0x00,IIC_Command,0);
}
/**********************************************
// IIC Write Data
**********************************************/
void Write_IIC_Data(uint8_t IIC_Data)
{
	// i2c_smbus_write_byte_data(OLEDfd,OLED_REG_DAT,IIC_Data);
	send_data(OLEDfd,IIC_Data);
	// I2CWriteByteTo(OLEDfd,0x40,IIC_Data,0);
}
/**********************************************
// IIC Write byte
**********************************************/
void OLED_WR_Byte(unsigned dat, unsigned cmd)
{
	if (cmd)
	{
		Write_IIC_Data(dat);
	}
	else
	{
		Write_IIC_Command(dat);
	}
}

/********************************************
// fill_Picture
********************************************/
void fill_picture(uint8_t fill_Data)
{
	uint8_t m, n;
	for (m = 0; m < 8; m++)
	{
		OLED_WR_Byte(0xb0 + m, 0); //page0-page1
		OLED_WR_Byte(0x00, 0);	 //low column start address
		OLED_WR_Byte(0x10, 0);	 //high column start address
		for (n = 0; n < 128; n++)
		{
			OLED_WR_Byte(fill_Data, 1);
		}
	}
}

//坐标设置

void OLED_Set_Pos(uint8_t x, uint8_t y)
{
	OLED_WR_Byte(0xb0 + y, OLED_CMD);
	OLED_WR_Byte(((x & 0xf0) >> 4) | 0x10, OLED_CMD);
	OLED_WR_Byte((x & 0x0f), OLED_CMD);
}
//开启OLED显示
void OLED_Display_On(void)
{
	OLED_WR_Byte(0X8D, OLED_CMD); //SET DCDC命令
	OLED_WR_Byte(0X14, OLED_CMD); //DCDC ON
	OLED_WR_Byte(0XAF, OLED_CMD); //DISPLAY ON
}
//关闭OLED显示
void OLED_Display_Off(void)
{
	OLED_WR_Byte(0X8D, OLED_CMD); //SET DCDC命令
	OLED_WR_Byte(0X10, OLED_CMD); //DCDC OFF
	OLED_WR_Byte(0XAE, OLED_CMD); //DISPLAY OFF
}
//清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样!!!
void OLED_Clear(void)
{
	uint8_t i, n;
	for (i = 0; i < 8; i++)
	{
		OLED_WR_Byte(0xb0 + i, OLED_CMD); //设置页地址（0~7）
		OLED_WR_Byte(0x00, OLED_CMD);	 //设置显示位置—列低地址
		OLED_WR_Byte(0x10, OLED_CMD);	 //设置显示位置—列高地址
		for (n = 0; n < 128; n++)
			OLED_WR_Byte(0, OLED_DATA);
	} //更新显示
}
void OLED_On(void)
{
	uint8_t i, n;
	for (i = 0; i < 8; i++)
	{
		OLED_WR_Byte(0xb0 + i, OLED_CMD); //设置页地址（0~7）
		OLED_WR_Byte(0x00, OLED_CMD);	 //设置显示位置—列低地址
		OLED_WR_Byte(0x10, OLED_CMD);	 //设置显示位置—列高地址
		for (n = 0; n < 128; n++)
			OLED_WR_Byte(1, OLED_DATA);
	} //更新显示
}
//在指定位置显示一个字符,包括部分字符
//x:0~127
//y:0~63
//mode:0,反白显示;1,正常显示
//size:选择字体 16/12
void OLED_ShowChar(uint8_t x, uint8_t y, uint8_t chr, uint8_t Char_Size)
{
	uint8_t c = 0, i = 0;
	c = chr - ' '; //得到偏移后的值
	if (x > Max_Column - 1)
	{
		x = 0;
		y = y + 2;
	}
	if (Char_Size == 16)
	{
		OLED_Set_Pos(x, y);
		for (i = 0; i < 8; i++)
			OLED_WR_Byte(F8X16[c * 16 + i], OLED_DATA);
		OLED_Set_Pos(x, y + 1);
		for (i = 0; i < 8; i++)
			OLED_WR_Byte(F8X16[c * 16 + i + 8], OLED_DATA);
	}
	else
	{
		OLED_Set_Pos(x, y);
		for (i = 0; i < 6; i++)
			OLED_WR_Byte(F6x8[c][i], OLED_DATA);
	}
}
//m^n函数
uint32_t oled_pow(uint8_t m, uint8_t n)
{
	uint32_t result = 1;
	while (n--)
		result *= m;
	return result;
}
//显示2个数字
//x,y :起点坐标
//len :数字的位数
//size:字体大小
//mode:模式	0,填充模式;1,叠加模式
//num:数值(0~4294967295);
void OLED_ShowNum(uint8_t x, uint8_t y, uint32_t num, uint8_t len, uint8_t size2)
{
	uint8_t t, temp;
	uint8_t enshow = 0;
	for (t = 0; t < len; t++)
	{
		temp = (num / oled_pow(10, len - t - 1)) % 10;
		if (enshow == 0 && t < (len - 1))
		{
			if (temp == 0)
			{
				OLED_ShowChar(x + (size2 / 2) * t, y, ' ', size2);
				continue;
			}
			else
				enshow = 1;
		}
		OLED_ShowChar(x + (size2 / 2) * t, y, temp + '0', size2);
	}
}
//显示一个字符号串
void OLED_ShowString(uint8_t x, uint8_t y, uint8_t *chr, uint8_t Char_Size)
{
	uint8_t j = 0;
	while (chr[j] != '\0')
	{
		OLED_ShowChar(x, y, chr[j], Char_Size);
		x += 8;
		if (x > 120)
		{
			x = 0;
			y += 2;
		}
		j++;
	}
}
//显示汉字
void OLED_ShowCHinese(uint8_t x, uint8_t y, uint8_t no)
{
	uint8_t t, adder = 0;
	OLED_Set_Pos(x, y);
	for (t = 0; t < 16; t++)
	{
		OLED_WR_Byte(Hzk[2 * no][t], OLED_DATA);
		adder += 1;
	}
	OLED_Set_Pos(x, y + 1);
	for (t = 0; t < 16; t++)
	{
		OLED_WR_Byte(Hzk[2 * no + 1][t], OLED_DATA);
		adder += 1;
	}
}
/***********功能描述：显示显示BMP图片128×64起始点坐标(x,y),x的范围0～127，y为页的范围0～7*****************/
void OLED_DrawBMP(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1, uint8_t BMP[])
{
	unsigned int j = 0;
	uint8_t x, y;

	if (y1 % 8 == 0)
		y = y1 / 8;
	else
		y = y1 / 8 + 1;
	for (y = y0; y < y1; y++)
	{
		OLED_Set_Pos(x0, y);
		for (x = x0; x < x1; x++)
		{
			OLED_WR_Byte(BMP[j++], OLED_DATA);
		}
	}
}

//初始化SSD1306
void OLED_Init(void)
{
	OLEDfd=open(IIC_DEV,O_RDWR);
	if(OLEDfd<0)
		errExit("OPEN I2C DEV");

	if(setI2CSlave(OLEDfd,OLED_ADD)<0)
		errExit("SET SLAVE");

	usleep(200*1000);

	OLED_WR_Byte(0xAE, OLED_CMD); //--display off
	OLED_WR_Byte(0x00, OLED_CMD); //---set low column address
	OLED_WR_Byte(0x10, OLED_CMD); //---set high column address
	OLED_WR_Byte(0x40, OLED_CMD); //--set start line address
	OLED_WR_Byte(0xB0, OLED_CMD); //--set page address
	OLED_WR_Byte(0x81, OLED_CMD); // contract control
	OLED_WR_Byte(0xFF, OLED_CMD); //--128
	OLED_WR_Byte(0xA1, OLED_CMD); //set segment remap
	OLED_WR_Byte(0xA6, OLED_CMD); //--normal / reverse
	OLED_WR_Byte(0xA8, OLED_CMD); //--set multiplex ratio(1 to 64)
	OLED_WR_Byte(0x3F, OLED_CMD); //--1/32 duty
	OLED_WR_Byte(0xC8, OLED_CMD); //Com scan direction
	OLED_WR_Byte(0xD3, OLED_CMD); //-set display offset
	OLED_WR_Byte(0x00, OLED_CMD); //

	OLED_WR_Byte(0xD5, OLED_CMD); //set osc division
	OLED_WR_Byte(0x80, OLED_CMD); //

	OLED_WR_Byte(0xD8, OLED_CMD); //set area color mode off
	OLED_WR_Byte(0x05, OLED_CMD); //

	OLED_WR_Byte(0xD9, OLED_CMD); //Set Pre-Charge Period
	OLED_WR_Byte(0xF1, OLED_CMD); //

	OLED_WR_Byte(0xDA, OLED_CMD); //set com pin configuartion
	OLED_WR_Byte(0x12, OLED_CMD); //

	OLED_WR_Byte(0xDB, OLED_CMD); //set Vcomh
	OLED_WR_Byte(0x30, OLED_CMD); //

	OLED_WR_Byte(0x8D, OLED_CMD); //set charge pump enable
	OLED_WR_Byte(0x14, OLED_CMD); //

	OLED_WR_Byte(0xAF, OLED_CMD); //--turn on oled panel
}
//关闭oled文件
int OLED_Close(void)
{
	close(OLEDfd);
}
